# How to integrate Google Stitch MCP with Atomic Agent ```json { "title": "How to integrate Google Stitch MCP with Atomic Agent", "toolkit": "Google Stitch", "toolkit_slug": "google_stitch", "framework": "Atomic Agent", "framework_slug": "atomic-agent", "url": "https://composio.dev/toolkits/google_stitch/framework/atomic-agent", "markdown_url": "https://composio.dev/toolkits/google_stitch/framework/atomic-agent.md", "updated_at": "2026-10-27T05:35:05.750Z" } ``` ## Introduction Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including Google Stitch. This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a Google Stitch account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions. ## Also integrate Google Stitch with - [ChatGPT](https://composio.dev/toolkits/google_stitch/framework/chatgpt) - [Claude Cowork](https://composio.dev/toolkits/google_stitch/framework/claude-cowork) - [Hermes](https://composio.dev/toolkits/google_stitch/framework/hermes-agent) ## TL;DR ### How Atomic Agent connects to Google Stitch Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication. Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account. ## Connect Google Stitch to Atomic Agent ### Connect Google Stitch to Atomic Agent - Sign up or sign in to the [Composio dashboard](https://dashboard.composio.dev/?cta_placement=atomic-agent-api-key). Copy your API key. - In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart. - Ask Atomic Agent to do something in Google Stitch. It searches Composio for the right tool. - On first use, open the sign-in link returned in the chat. Connect your Google Stitch account, then return to Atomic Agent to continue. ### Headless setup Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file. ```bash COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY ``` ## What is the Google Stitch MCP server, and what's possible with it? The Google Stitch MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Google Stitch account. It provides structured and secure access to your projects, screens, design systems, and design files, so your agent can create interface designs, edit screens, generate variants, apply design systems, and manage project assets on your behalf. - Project creation and management: Have your agent create, list, inspect, and permanently delete Google Stitch projects. - AI screen generation and editing: Direct your agent to generate screens from text prompts, edit existing screens with text instructions, and retrieve screen details. - Design exploration with variants: Let the agent create multiple screen variants with specified creative ranges, aspect ratios, device types, and supported models. - Design system workflows: Instruct your agent to create, update, list, and apply design systems across screens, or build a design system from uploaded DESIGN.md content. - Screen file access: Have your agent list screens and download available HTML or screenshot files for use in your design workflow. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `GOOGLE_STITCH_APPLY_DESIGN_SYSTEM` | Apply Design System | Apply one design system to 1-20 unique typed screen instances from Get Project. Returns every restyled screen plus any clarification, progress, design-system, or session output. This mutating generation request is sent once and never retried; reconcile an indeterminate failure with project reads. | | `GOOGLE_STITCH_CREATE_DESIGN_SYSTEM` | Create Design System | Create a typed Stitch design system from explicit current theme fields. Providing project_id creates it for that project; intentionally omitting project_id creates a global asset. This non-idempotent operation is attempted once and is never retried automatically. | | `GOOGLE_STITCH_CREATE_DESIGN_SYSTEM_FROM_DESIGN_MD` | Create Design System From Markdown | Create a project design system from the exact screen instance returned by Upload Design Markdown. The non-idempotent request is sent once and is never retried by this action. | | `GOOGLE_STITCH_CREATE_PROJECT` | Create Project | Create a Stitch project container for UI designs and return its project resource name. This non-idempotent operation is sent once and is not retried by the action. | | `GOOGLE_STITCH_DELETE_PROJECT` | Delete Project | Permanently delete one Google Stitch project. This destructive operation cannot be undone, requires explicit confirmation, and is attempted once without automatic retries. | | `GOOGLE_STITCH_DOWNLOAD_FILE` | Download Screen File | Retrieve bounded HTML or screenshot content using a provider-owned Stitch file resource name. Arbitrary URLs are never accepted or fetched. | | `GOOGLE_STITCH_EDIT_SCREENS` | Edit Screens | Apply one text-directed edit to up to 20 existing Stitch screens and return every changed screen or clarification question. This operation may continue after a timeout, so the action sends exactly one request and never retries. | | `GOOGLE_STITCH_GENERATE_SCREEN` | Generate Screen | Generate screens from a bounded text prompt in an existing Stitch project. Returns every generated screen or recoverable clarification output. This paid or mutating operation is attempted exactly once; a timeout or connection loss is indeterminate and is never retried automatically. | | `GOOGLE_STITCH_GENERATE_VARIANTS` | Generate Screen Variants | Generate 1-5 variants for up to 20 unique source screens with exact creative-range, aspect, device, and model enums. Returns every generated screen or recoverable clarification output. This generation request is sent once and never retried. | | `GOOGLE_STITCH_GET_PROJECT` | Get Project | Get one Stitch project by full resource name, including screen instances needed for design-system application. | | `GOOGLE_STITCH_GET_SCREEN` | Get Screen | Get one Stitch screen by full resource name and return bounded screen metadata plus provider-owned HTML and screenshot file references. | | `GOOGLE_STITCH_LIST_DESIGN_SYSTEMS` | List Design Systems | List complete Google Stitch design systems for one project. The live provider requires project_id and exposes no pagination. | | `GOOGLE_STITCH_LIST_PROJECTS` | List Projects | List complete Google Stitch projects owned by the connected account or explicitly shared with it. Owned projects are returned by default. | | `GOOGLE_STITCH_LIST_SCREENS` | List Screens | List all screens currently returned for one Stitch project, including safe HTML and screenshot file resource references. | | `GOOGLE_STITCH_UPDATE_DESIGN_SYSTEM` | Update Design System | Replace a Stitch design system's display name and typed nondeprecated theme for one project. Sends only the fixed update_design_system operation, validates the returned asset or project-session identity and bounded fields, and never retries an indeterminate update. | | `GOOGLE_STITCH_UPLOAD_DESIGN_MD` | Upload Design Markdown | Upload bounded UTF-8 DESIGN.md content to a Stitch project and return the screen instance required by Create Design System From Markdown. The action uploads content only, never reads local files or executes the content, and does not retry after an indeterminate failure. | ## Supported Triggers None listed. ## Troubleshooting ### Why is my API key rejected? Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying. ### Why are Composio tools unavailable after saving a key? Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk. ### Does Composio have a free plan? The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See [Composio pricing](/pricing) for the current limits that apply to your connection. ## Complete Code None listed. ## Conclusion ### Use Google Stitch from Atomic Agent With your account connected, ask Atomic Agent to work with Google Stitch in natural language. You can connect more apps through the same Composio integration as you need them. Visit the [Atomic Agent website](https://atomicagent.io/?cta_placement=atomic-agent-site) or inspect the [Atomic Agent source code](https://github.com/AtomicBot-ai/atomic-agent?cta_placement=atomic-agent-repo). ## How to build Google Stitch MCP Agent with another framework - [ChatGPT](https://composio.dev/toolkits/google_stitch/framework/chatgpt) - [Claude Cowork](https://composio.dev/toolkits/google_stitch/framework/claude-cowork) - [Hermes](https://composio.dev/toolkits/google_stitch/framework/hermes-agent) ## Related Toolkits - [Figma](https://composio.dev/toolkits/figma) - Figma is a collaborative interface design tool for teams and individuals. It streamlines design workflows with real-time collaboration and easy sharing. - [Abyssale](https://composio.dev/toolkits/abyssale) - Abyssale is a creative automation platform for generating images, videos, GIFs, PDFs, and HTML5 content programmatically. It streamlines and scales visual content production for marketing, design, and operations teams. - [Alttext ai](https://composio.dev/toolkits/alttext_ai) - AltText.ai is a service that generates alt text for images automatically. It helps boost accessibility and SEO for your visual content. - [Are.na](https://composio.dev/toolkits/arena) - Are.na is a creative research platform for collecting images, links, notes, and ideas in channels. Use it to organize inspiration, build knowledge maps, and connect research across projects. - [Bannerbear](https://composio.dev/toolkits/bannerbear) - Bannerbear is an API-driven platform for generating images and videos automatically at scale. It helps businesses create custom graphics, social visuals, and marketing assets using powerful templates. - [Bannerbite](https://composio.dev/toolkits/bannerbite) - Bannerbite is a creative automation platform for generating images and videos from reusable projects and templates. It helps teams produce on-brand visual assets faster without rebuilding designs from scratch. - [BeatAPI](https://composio.dev/toolkits/beatapi) - BeatAPI is an asynchronous API platform for AI image, video, and music workflows. It enables scalable generation, video analysis, uploads, and ecommerce video pipelines. - [Builder.io](https://composio.dev/toolkits/builder_io) - Builder.io is a visual development platform for managing content, models, assets, and Space configuration. Use it to ship editable digital experiences faster without waiting on every code change. - [Canva](https://composio.dev/toolkits/canva) - Canva is a drag-and-drop design suite for creating professional graphics, presentations, and marketing materials. It makes it easy for anyone to design with beautiful templates and a vast library of elements. - [Canva MCP](https://composio.dev/toolkits/canva_mcp) - Canva MCP is Canva's remote MCP server for accessing designs and content. It centralizes design assets and enables programmatic design workflows. - [Claid ai](https://composio.dev/toolkits/claid_ai) - Claid.ai delivers AI-driven image editing APIs for tasks like background removal, upscaling, and color correction. It helps automate and enhance image workflows with powerful, developer-friendly tools. - [Contentdrips](https://composio.dev/toolkits/contentdrips) - Contentdrips is an asynchronous rendering API for branded graphics and carousels. It turns reusable templates into on-brand social visuals at scale. - [Creatomate](https://composio.dev/toolkits/creatomate) - Creatomate is an API for generating automated videos, images, GIFs, and reusable media templates. Use it to turn structured data into polished visual content at scale. - [DeepImage](https://composio.dev/toolkits/deepimage) - DeepImage is an AI-powered image enhancer and upscaler. Get higher-quality images with just a few clicks. - [Dreamstudio](https://composio.dev/toolkits/dreamstudio) - DreamStudio is Stability AI’s platform for generating and editing images with AI. It lets you easily turn ideas into stunning visuals, fast. - [Dribbble](https://composio.dev/toolkits/dribbble) - Dribbble is a design community and publishing platform for managing shots, projects, and attachments. Use it to showcase work, collect feedback, and organize creative designs. - [Dynamic Mockups](https://composio.dev/toolkits/dynamic_mockups) - Dynamic Mockups is an API platform for generating product mockups, rendering templates, and managing visual asset catalogs. Use it to automate high-quality product visuals, AI images, and motion assets at scale. - [Dynapictures](https://composio.dev/toolkits/dynapictures) - Dynapictures is a cloud-based platform for generating personalized images at scale. Instantly create hundreds of custom visuals using your data sources, like Google Sheets. - [Eraser MCP](https://composio.dev/toolkits/eraser_mcp) - Eraser MCP is a workspace for creating and managing technical diagrams and structured documents. It helps teams organize, version, and export diagrams with collaboration-focused tooling. - [Excalidraw MCP](https://composio.dev/toolkits/excalidraw_mcp) - Excalidraw MCP is a no-auth MCP server for creating hand-drawn style diagrams in Excalidraw. Use it to generate visual sketches with viewport camera control and fullscreen editing. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Google Stitch MCP? With a standalone Google Stitch MCP server, the agents and LLMs can only access a fixed set of Google Stitch tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Google Stitch and many other apps based on the task at hand, all through a single MCP endpoint. ### Can I use Tool Router MCP with Atomic Agent? Yes, you can. Atomic Agent fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Google Stitch tools. ### Can I manage the permissions and scopes for Google Stitch while using Tool Router? Yes, absolutely. You can configure which Google Stitch scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do. ### How safe is my data with Composio Tool Router? All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Google Stitch data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)